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Sylvan Arms Folding Stock Adapter Gen 5 SA5P-R (also known as the Sylvan Arms SA5 Pro AR-15 Folding Stock Adapter – Right Side Folding).
This is the current Gen 5 / SA5 Pro model from Sylvan Arms, a premium folding stock adapter designed to turn your AR-15 (or compatible AR-9/AR-10) into a compact, concealable platform while maintaining full functionality. The SA5P-R variant is the right-side folding model (stock folds to the right side of the rifle).
Key Features & Specs
- Material: Precision CNC-machined from 4140 steel (much stronger and more durable than previous aluminum generations).
- Strength: Claimed 250% stronger than the Gen 4 adapter.
- Weight: Only 9.4 oz — keeps the rifle lightweight and balanced.
- Folding Direction: Right-side folding (SA5P-R). A left-side folding version (SA5P-L) is also available.
- Design Highlights:
- One-piece steel construction with improved locking mechanism for rock-solid open/closed positions.
- Adjustable hinge tension.
- Improved and hardened buffer pin.
- Two QD sling attachment points.
- Standard 1-3/16" x 16 threading (compatible with most buffer tubes).
- Compatibility:
- Mil-Spec AR-15 lowers and most AR-10 builds.
- Most 9mm ARs (standard sizing; includes a bolt extension for 5/8" ID 9mm bolt carriers after removing the pin and weight from the BCG).
- Compatible with .223/5.56, .308, .300 Blackout, and most AR-9 setups.
- Not compatible with Tippmann 22 or LWRC pistols.
- Installation: Extremely easy — installs in under 5 minutes with included tools. Screw-on design; no permanent modifications required. User-serviceable.
- Additional: Made in the USA. Designed and tested with input from professionals and protectors. When folded, the stock sits close to the receiver (typically ~0.5" gap reported by users).
The Gen 5 SA5 Pro addresses common complaints from earlier generations with stronger steel construction, better locking, improved QD points, and refined ergonomics. Users on forums and reviews praise the solid lockup, smooth folding action, and how it makes the rifle much more compact for storage, transport, or vehicle use while remaining fully functional when unfolded.
Who It's For
- AR-15 owners wanting a quick, reliable way to make their rifle more compact without sacrificing reliability.
- Tactical, home-defense, or vehicle users who need a folding stock for better maneuverability or concealment.
- 3-Gun or practical shooters who appreciate fast deployment and sturdy construction.
- Anyone upgrading from older aluminum folding adapters.
Note: Folding stock adapters on pistols or SBRs may have legal implications under the National Firearms Act (NFA). Always ensure compliance with federal, state, and local laws.
